<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.box {
width: 20px;
height: 30px;
transform: rotate(90deg);
-ms-transform: rotate(90deg);
/* Internet Explorer 9*/
-moz-transform: rotate(90deg);
/* Firefox */
-webkit-transform: rotate(90deg);
/* Safari 和 Chrome */
-o-transform: rotate(90deg);
/* Opera */
}
</style>
</head>
<body>
<p class="box">123</p>
</body>
</html>
效果：
原效果：
